Sistema Ox Bel Ha

One of the world’s largest known underwater cave systems, total explored length – 270.1 km.

Sacred Cenote in Chichen Itza

Sacred Cenote, Chichen Itza

Human sacrifice site of the ancient Mayan Chichen Itza city. In deposits have been discovered huge amounts of gold and jade artefacts as well as human remains.

Loltun Cave

Engravings in Loltun Cave

Cave with some of the best Mayan cave paintings as well more ancient carvings and remnants of prehistoric animals hunted by Paleoindians.

Oxtotitlán

Copy of a painting in Oxtotitlán Cave, ruler on throne

Cave with unique ancient Olmec paintings made 900 – 500 BC.

Juxtlahuaca

Juxtlahuaca Cave, ancient painting of jaguar

Cave with unique ancient Olmec paintings made 900 – 500 BC.

Cuatrociénegas Valley (Cuatro Ciénegas Valley)

Cuatrociénegas, Poza Azul

Unusual part of Chihuahua desert with thousands of geothermal spring pools. Extremely high biodiversity including more than 70 endemic species not found outside this valley. Most unique are stromatolites in spring lakes, endemic plants in gypsum dunes, fishes in lakes.

Lake Alchichica

Alchichica Lake with stromatolites, Mexico

Unique maar lake with a high level of endemism, especially noted due to rare stromatolites met only in few locations around the world. Endemic salamander and fish. Renowned location of unusual experiences such as UFO sightings, lights in the lake.

Pù Mát Pride of Vietnam

The largest tree in Vietnam – more than 70 m high sa mu tree (Cunninghamia konishii). Its trunk has a circumference of 23.7 m, diameter of 5.5 m.